Playing multiple files simultaneously using sox in linux

I am writing a script that plays announcement using sox in linux. I use the following syntax to specify the file and the speaker to play to:

sox -v 1.5 file.mp3 -t pulseaudio [speaker_name]

Is there a way to play the same file into two different speakers at the same time? I am actually using passing the system commands using python script and was able to "somehow" achieve this task using this script. However this appears to complicate things and I was hoping there is a different approach.

import os                                                                       
from multiprocessing import Pool

def run_process(process):                                                             
     os.system(format(process))                                                                                      

processes = ('sox -v 1.5 file.mp3 -t pulseaudio [speaker_name]', 'sox -v 1.5 file.mp3 -t pulseaudio [speaker_name2]')                                    
                                                           
      

pool = Pool(processes=2)                                                        
pool.map(run_process, processes) 

I also tried separating the commands in linux terminal using & or && but it still plays one file at a time.

Any guidance on how to play both files at the same time either using sox syntax or some other linux method?

thank you